Gear shifting mechanism



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J. H. MccARTHY 1,835,167

GEAR SHIFTING MECHANISM Filed Jan. 5l, 1950 4 Sheets-Sheet 2 l@ xv INVENTOR J. meuf/g BY www@ ATTORNEY' Dec, 8,- 1931. J. H. MGCARTHY GEAR SHIFTING' MECHANISM 4 Sheets-Sheet 5 Filed Jan. 31, 1930 INVENTOR v J. H. NcCaf/*zy BY ATToRNEYs Patented Dec. 8,1 1931f i UNITED Jouir n. MecARTiiY, or cniciieo, kILLINOIS t -GER siiirriivs MEcHANIsM." f

Y vAppl,eat'oii filed Januaryil,` )1930.fSeria1fNoQ 424,927. l

My invention relates to improvements :in

gear shifting meelianisms,fand' consists in the combinations, constructions, and arrangements herein described'aiidclaimed An object of my invention is to lprovide` a gear shifting mechanism-which hasfnovel means whereby the gear shiftingmeclianism ofa vehicle may be quicklyactuated `and easily controlled i i A further object is to providelnov'el means `for automatically selecting and shifting the gears of an automobile. A further object isV` to provide a gear sliift= ing mechanism forvehicles whei'eby the gear positions are preselected. l" 'I Y l A Y A further gob'ect ofmy inventionis to provide novel means whereby thefgear shift- 'ing -mechanism for vehicles may be controlled from the Vsteering wheel of the vehicle. A further object is to provide 'a device which has novel means for Apreventing the "gears from ybeing while the clutches arel in contact. A furtherobject istofprovideY a device which has `novel means for preventing the gears from clashing-whenthrown in mesln` A further object of my invention is to provide a device of the type described which is vsimple in construction, durablefand efficient for the purposesintended.

in the following specification, -andthe'i novel pointedout iiifthe appended claimsr f z yi 1 panying drawings,` formingpart" of this ap-` plication, in which' I l l Y Figure 1 isa top plan view of my device as applied to a vehicle transmission, portions thereof being showninsection, Y -V l lfigure Qfis Aan elevation .ofthe selective mechanism with a portion showninsection,

Figure 3 is aview of a rportion ofthe selective mechanism showing theV cam p'art of the selective mechanism with-portions shown'in section, 1 y 3' M 1 t `Figure 4' isa top plan lview of `a steering ,wheel `with `the deviceV applied thereto,

Figure 5 is a verticalgsectionalview of the 'J transmission mechanism italien along the line thrownin or outof mesh l -13-13'of'Figure 8,

Other objec'tsand advantages will appear Y,

My invention is illustrated inthe accolm- Figure 19 'is anenlarged 5:-"5 'y ofV Figure 1,` .portions tliereofbeing "il,

shown rin elevation, A c g p Figure 6 is an elevationof the clutch mechanism used invconnection with the device, having portions thereof shown in section,

1 .5,5 Figure 7 is a section alonglthe line 7-7 l "of Figure 5,

Figure 8 `is an enlarged detail-*sectional 'View of the selective mechanism-,shown in Figure`2,` f`

, `60 AFigure 9 is an enlarged sectional detail i view of a portion of the selective mechanism, showing its selective position and having parts shown infelevation,` A

Figure 10 `isfa Aportion of the gear actuatl .65

ing'mechanism, shown in Figure 1, when in itsselective positiom- L i y `Figurel'l is a section along the line 11--11 of Figure 8, l

` Y Figure 12 is a section taken along thefline zo 12-12 of Figure 9, K

Figure 13 is a section taken alongthe line Figure 14 'is an enlarged sectionalfview taken along the linell-M of FigurelO,` ,-15

Figure 15 is a section along the linellh of Figure l0, f-

p Figure 16 lis an enlarged vertical sectional view of the clutch mechanism shown inthe ,gear transmission'oflFigure1,*i 1

Figure 17 is an elevation ofthe facesfof n l 'the clutch plates shown in Figure 16,? Y f features ofthe invention will-be particularly Figure 18iis a sectionallview takenalong the line18`-18 of Figure-10, and

M detail .i sectional view of a portion of the selective mechanism, y

The 'compartment 2 encases orV containsa transmission mechanisme of a vehicle; andl the compartment gencases the gear-'shifting actuating mechanism 5; The gear-shifting mechanism comprises )two lon- :.95 gitudinally extending movable members 6 and '7 disposed'in Vslidablerelationship and having a common aXis,-adapting themto be rotated as a unit. The end portions 8 and9 of ltheislidable members 6 and?, respectively, 110.

are oppositely disposed and in combination rotatably mounted in a supporting bearing member 10, and have mutually cooperating and offset engaging portions 11, as shown 1n Figure 18.

The opposite end portion 12 of the slidable member (i, is slidably disposed in a cylindrical member 13. The end 14 of the slidable member` 7 is also disposed in the cylindrical member 13 and is rigidly fastened thereto. An arcuate-shaped or substantially semi-annular flange 15 is disposed on one side of' the slidable member 6 and is integral therewith, and a similar flange 16 is similarly disposed on the other side of the slidable member 6 and ata spaced-apart position with respect to the flange 15. A similar flange 17 is disposed upon the slidable member 7 and in an opposite position to that of the flange 15 on the slidable member 6. A similar flange 18 Vis disposed on the slidablemember 7 and in opposite relation to the flange 1G on the slidable member 6. y

A portion 19, which is a part of the slidable member 7, connects the flanges 17 and18 of' the slidable member 7, and is substantially rectangular` in cross section as shown in Figure 15. The portion 19 has one end integral with the flange 17, as at 20, and a portion of the other end is integral With the flange 18, as at 21. The remaining portion abuts the flange 16 at 22.

A portion19, similar to the portion 19, is part of the slidable member 6 and is integral with the flanges 15 and 1G abutting the flange 17.

Collars 23 and 24 are fixcdly secured to the slidable members G and 7, respectively. A lever 25 is pivotally mounted at its center and has one end pivotally connected to a connecting link 26 which is provided with means for engaging the collar 23 for actuating the same. The other end of the lever 25 is pivotally connected to a. connecting link 27 which is provided-with means for engaging the collar 24.

A support 28 is provided in the casing portion 3 in which the connecting link 26 is slidably mounted. Asimilar support 29 is provided for the connecting link 27. rlChe link 27 is provided with a compression spring 30 Which is disposed between the support 29 and a member 31 Which is rigidly attached to ,the link 27. A crank 32 has one end disposed in a bea-ring 33 which is rigidly secured to the link 27. .One end of an actuating rod 34 is disposed upon the other end of the crank 32 and is provided with a slot 35 whereby it may be slid-ably connected to a clutch-actuating lever The cylindrical member 13, With which the slidable members 6 and 7 are associated, is disposed in a plate 37 which may be a part of a Wall of the casing and acts as a bearing and supporting means for the cylindrical member. The plate 37 is provided with a plurality of equally spaced-apart openings or apertures 38 which are disposed on the circumference of the opening 39 in Which the cylindrical member 13 is slidably and, under certain conditions hereinafter described, rotatably mounted. Sliding valve members 40 are disposed adjacent the plate 37 and adapted to close the openings 38.

The sliding valve members 40 are provided With flanges 41. The bearing plate 37 has superin'iposed plates 42 and 43 which contain and slidably hold the flanges 41 of the sliding valve members. The plates 42 and 43 have the same apertures 38 and opening 39, in which the cylindrical member 13 is disposed, as has the plate 37.

A flange or projection 44 is disposed on the cylindrical member 13 and may be integral therewith. The fiange 44 is provided with a slight bevel 44 on the inner rear edge of its rotating direction to facilitate its sliding into the opening 38 When the sliding valve members are actuated to permit the apertures 38 to be opened. Springs 45 are associated with the sliding valve members and are enclosed by casing members 46 Which are attached to either or all of the plates 37, 42, and 43. A circular fiange 47 is disposed on the plate 43 and has its inner circumference 48 at a distance from the cylindrical member 13 equal Vto the height of the flange 44, in order that the cylindrical member 13 may be rotated when the liange 44 is Without the openings A cam plate 49 is rotatably mounted upon the outer circumference 50 of the circular flange 47. As seen vin Figure 2, the cam plate 49 has a plurality of cam projecting portions or surfaces 51, equal in number to that of' the sliding valve members 40, and arranged I so that only one cam projection will come into engagement With any of the valve members at one time, and therefore only one of the apertures 38 Will be opened at one time by the sliding valves for receiving the projection 44 of the cylindrical member 13.

Cam projections 52 and 53 are disposed adjacent the outer face of the cam plate 49, and projections 54, 55, and 56 are disposed adjacent the inner face of' the cam plate. The cam projections 52 and 53 are adapted to operatively and exclusively engage projections 57 of sliding valves 58 and 59, respectively, `and the cam projections 54, and 5G are adapted to operatively and exclusively engage projections 60 of sliding valves 61, 62, and 63, respectively. The valves 58 and 61 are the neutral and reverse speed control valves respectively, and the valves 62, 59, and 63 are the first, second and third speed control valves respectively. When the cam plate is rotated, the cam projections 52 and 53 are adapted to pass by the valve 62 Without actuating it, and in a like manner the projections 54, 55, and 56 will llt therewith, Theldirection ofrot'a-tion'ot the" pass by the valves 58-and159`without actu- A` retaining plate v64vi's iixedly.: attached to the face of the circula-rfiange' 47 andpro'- jects over a portion ofthe cam'fplate'f49 .for holding the cam plate inplace; A stationary plate member 65 is rigidlysecured to either or all oi: the plates 37,42pand 43 and basan arcuate-shaped side'fGG` corresponding to a p'ortionof the lcontour-ofv the cam'pla-te'49 and disposed adjacent thereto;Vv The plate memberr providesv a1rfabutment`for thel projections "54andl56 when the'cam plate is located" suiiicientlyl to permit the projections 54 and J56to come into engagement therewith, therebylimiti'ng' the rotation ofthe j cam. plate 49. lAn' arcuate-shaped `actuating plate 67 is rigidlyattachedto the cam plate 49 and has its periphery provided with gear teeth 68 which engageWith a gear-Wheel 69, vixedly disposed on a rotatable shaft 70.

Y ThewshaftTO isv provided with a bevel gear i 7 `1,V fixedly a-ttachedto one end thereof, which is in mesh With another bevel gear'l rigidly attached to one endofarotatableshaft 73.KV

The f shaft isdisposedv `adjacentv avsteering mechanism L74 of a vehicle andjhas'a manually actuated -handle 75 rigidly attached` to its opposite end thereof, :nlja-cent asteeringA Wheel76 ofa vehiclef j ,i speed or gear-position indicatingmea-ns 77 is fixedly attached to alsupporting member' 78 of theV steering Wheelf76 andis provided with markings. T9-to indicate the gear posi-V tions. A handle i is provided with a projection 81"forengaginggrooves-82, cut on thejface of the indicating means 7 7,tov enablel the operatorto ascertain b-y'his senseoi' touch Wlienthe handle is in the desiredposition. The indicating means is alsoprovided With projections S3 at its extremities andfv adjacent its' eXtreme.V gear-'speed markingsl or engaging the'lhandle projection 81,4 thereby limiting the rotation oftlielhandlepro- I jection. A continuously rotating plate Aor cylinder-actuating member 84 ismdisposed adjacentthelcylin drical member 13 and 1s larrl ranged to yieldingly and frictionallyengage the cylindrical member when Ithe cylindricalV member is extended to come into engagement member 84 isiinmaterial.` v y The rotating :member 84gisislrdably `Vdisposed onSashaft'S' which may be cjnnected to any rotating'mechanism suchiasthe'ffan shaft of a vehicle-engine 86.` v1A compression j spring 87 is disposed `between the rotating member'84 andfaanember 88 for holding thev rotating Imember 84 Vand 'the ;eylindrical member 13 in positivefrictional engagement when said members are in contact.

In lthe transmission f mechanism ai sliding gear.s89 is adapted to mesh `withareverse Y speed gear90andaffirst forwardspeed gear 91""of an Eauvxiliar'yy vshaft L92,? and a 4sliding gear93 is adaptedtoi externally` mesh witha i second speed forwardv gear 94Yand to internally'mesh Witha thirdspeed or direct drive gear 95. E' A gear 96`offamain driveshaft 97;V 1s in mesh With` an auxiliaryshaft-driving gear: 98.11

ably disposedadjacent the casing `1 and are operatively connected to thesliding-*gears 89v and 93, respectively, of the-transmission mechanism 4. Thelslid'ablejbarsl99f=and 100 are provided vvith offset kprojecting portions .101"and `102, respectivelyx 4The projecting portions '101 and 102 areprovided with U- shaped or lange-enga'gingfendportions 103 posed adjacent the recesses thereof; 'Ijhelevers'are pivotally mounted'l at`111 and have f Slidable'rods or are islid.-

compression Vsprings"112 jdisposed `between e their inner `sides and the 'rear Walls of the recesses Which tend to 'force-fthe Vleve'rfarms outwardly into the recesses.` The lower-lex-` tremities :of thelevers-109 and 110 are freceivable infrecessed retaining or stationary members113, Which'hold` the levers kl09`=and 110 Vin locking engagement therewith, thereby holding the slidablebars and v`'iagainst movement excepting When the several projecting-Vlanges associa-ted V.with the slidable flanges come into engagement With the levers 99 and 10o. f .w K v The gear. transmission 4'fis: provided with a clutch mechanism 114 comprising; -tvvo plates' 115 and 116.`j The plate 115 is'slidably mounted on the main transmission:shaft-117,

and the plate 116 is rigidly mountedto the main drivenshaft'118l E `The aces'tvof the plates v and 116 areprovided with alternfatinghigh and lowfprojecting portions 119 and 120, res'1'3ectively,vvhichlarecof uniform' Width and are spaced vapartand'adjacent the circumferences thereof. The `spaces and proj ectionsare all of the uniform `Width thus permitting the' projections to occupy-the spaces.

Oney end .of an arm 121 is 4in operative e11- gagement with a collar `122 attached tothe movable plate 115, and the other end is rigidly connected toarod 123. One endofthe rod-123 is pivotally connected `at y124to a transmission braking'leverpl of' agytrans-Vv mlssson braking mechanism u 126. The-braktao' ing mechanism 126 comprises a lever member 1251 loosely disposed about the main trans'- mi'ssion shaft 117 and having-'a bifurcated end portion'127 disposed onf the auxiliary shaft 92. 1 i

A bearing or supporting member-128 is disposed inthe casing 2 and'acts as affulcrum for. the lever member 125. The auxiliary transmission shaft 92 and the maintransmission shaft 117 havefrictional-plates129 and 130,- respectively, rigidly secured thereto, which have surfaces 131` for frictionally engagingfthe lever member 125. The rod 123 has itsopposite end pivotally connected at 132 to a lever arm 133 and has a spring 134 disposed between the pivotal connection 132 and the casing. 2. The lever arm 133 has one end pivotally connected at 135to aprojection on the side of the casing 2 and its other end operatively connected to one end of an actuating; rod 136. The actuating rod 136 has its other end pivotallyconnected to a supplementary clutch lever 137. A connecting link 138 has one end pivotally attached to the actuating rod' 136 at 139 and theother end rigidly secured to the main clutch actuating arm member 140.

AThe clutch actuating level 36 has an extending armA 141 which has an offset portion 142. The offsetarm 142 is provided with a roller or wheel 143, rotatably attachedthereto and in operative engagement with the edge 144 of the supplementary clutch lever 137.

Frointhe foregoingdescription ofthe various parts of the device, the operation thereof may be readily understood. Let it be assumed.l that the operator of the vehicle wishes to put the vehicle in low or first speed position shown in Figure 1. rEhe handle 7 5 is first moved to the position shown in Figure 4 so thatthe handle projection 81 engages the groove, on the indicating means 77, at 13. rllhe `movement is imparted tothe cam plate 49: by means of the association of the gear plate 67, the gear wheel 69, the bevel gears 71`and` 72, and the shafts 70and 73. vThe cam plate isthus rotated until the cam projection 55' comes into engagement with the valve projection ofthe valve 62, thereby opening the aperture-38.

Theflange 44, on the cylinder 13, may, as far as the operation has thus far proceeded, be contained in any of the apertures'opposite theother slidingvalves. Thus it will be seen that while theV vehicle is operating in one speed, the next desired'speed may be selected` by actuating the speed-selecting mechanism without actuating the gear shifting mechanism.,

Inv continuing the operation the clutch lever 148, in Figure 6, is pushed forward in the direction of the arrow 145. frs the lever 148 advances, the-auxiliary lever 137 is pulled in the same direction, thereby pullingfon therod 136;` The rod 136, during this movement,

serves to releasethe main clutch 140 and the supplementary clutch 114, shown inFigurc 1.. rIlhe rod 136 also actuates the "transmissionv brakingfmechani sm V126 which instantly tends to reduce the speed of rotation of the transmission gearswhen the clutches arereleased. j

lVhen the clutches` and transmission braking mechanism have beenactuated,the roller 143, see Figure 6, rides over the shoulder of the auxiliary clutch lever so that the auxiliary clutch lever ceases to' move forwardly. At the same time the clutch lever 36 has reached the end of the slot 35 and the continued movement forward of the clutch lever 36 pulls the rod 34 forwardly.

rlhe rod34 in being'operatively connected to the sliding members and 7 actuates them until `Jthey assume the positions similar to those shown in Figure 10. At this time the semiannular flangesv 15 and 17A and also 16 and 18v are positioned opposite to each other. The projecting flanges 105 and 106 of the annularflanges 15 and 17, respectively, align with the U.-shaped engaging portions 103, and the proj ectin'g'fl'anges 107 and 108' of the annular flanges 18 and 16, respectively, align with the U-shap'ed engaging portion, 104 as shown in Figure 10. During this movement, the annular flanges 15 and'1'6, being'integrfal with the slidable member 6, move in the direction of the arrow 146 and the annular flanges 17 and 18, being integral with the slidable member 7, move in the direction of the arrow 147, as shown in Figurel. .i

The cylindrical member 13 moves inthe same direction asthe slidable member 7, being flXedly attached thereto, until said cylindricalmember. comes into frictional engagement with the continuously rotating menibei.'` 84, at which time the flange 44 is without the aperture it was contained in, thereby permitting the cylindrical member 13 to rotate in sympathy with the member 84', as shown in Figure 9. lWhen theflange leaves the aperture it was contained in, the valve for that aperture automatically closes and' canonly be opened again by actuatingthe Vhandle 7 The cylindricalmember 13 is now 'freet'o rotate.

When the clutch lever 36 is in the first stage of its return 'by reason of the spring 30, it tends to return the slidable semiannular flanges to positions similar to those shown in Figure 1. IThe cylindrical-member 13 and the semiannular flanges rotate in unison until thel flange 44 engages the edge of the apertures 38 which the valve 62 has openedgand is pulled therein by the action of the spring 30;

lVhen the flange 44 is at the point of entering the aperture 38, the projecting: flange 105-of the semiannular flange 15, automatically releases the locking lever 109 by being in engagement with the U-sliaped; portion 103 ofthe'slidable bar 99.V "f It'will be seen that as the cylinder 13 moves into its locking position shown inFigure 8,l the semiannular flange 15 having the projecting nange 105 movesto the position, shown in Figure 1 therebyactuatingthe sliding barf99 which in turn moves the'gears 89'and 91into full mesh, which is the first speed position.`

It vvill be observed that the transmissionV braking mechanism will so decrease thezmo- C mentum ofthe transmission mechanism thatv the meshing-vof the Vgearsfvvill be compara.-

tively noiseless. I

" Upf to this period, the` clutches are not mesh4 as' the auxiliary clutch leverhas` not moved. During the second stage'of `the return tothe operative p'osition, the auxiliary l clutch leverfispulled' backto itsnormal position'bysthe actionof the spring V134, in

i z Figure )1,011` the lever armi-133, thereby permitting the engagement ofthe clutchfmechanisins and the: 'release of 'the transmission braking mechanism. l The transmission braking mechanism `,and theclutches may be so adjusted asito" permitthe`clutches-to be released `slightly/primato the braking alction of Vthe Abraki'ngf mechanism, and to release the braking action slightly prior 'to the clutches reengaging. j f s Ifit is now desired to put the mechanism in neutral, the handle 7 5, is turned tothe letter N on the indicatingLV member'l 77. Thisv actuates the valve 58 Which opens the aperture 'adjacent 'thereto in the manner heretofore described.v `The lchange of speeds is not aected, however, until the clutch pedal 148 is'actuated, therebycausing the flange 44 to fly outof the iirst' speedaperture and rotate until it lencountersy and slides into the neutral speed aperture.

it win be observed that when 'thi-stirring mechanism is in neutral, the blank'portionsV N', seeFigures14 and 15, ofthe semianniilar flanges will be disposedopposite to the U- Y shaped ends of the sliding bars v99 and 100. It vvillf'be noted,by rvievving Figures 14 and 15, `thatthe .sliding bars 99 and100 can operate in'tvvo directions, dbut only one of the bars can be actuated at one time and neither of them'are actuated vvhenthe mechanism is in neutral. Thus it will` `be'seen that any speed maybe selected ivvhileoperating in anyV other speed, the change being merely kicking the V"clutch-pedal. s y n It will be noted that the transmissiondeeected Y scribed is theV 'Well known standard sliding gear type, and that` the` gearshift herein specified is Vadapted to be used in combination with that type of transmission.

Iclaim:` y, p 1; The combination with a transmission mechanism including gears, of a gear shifting "device comprising a shaft rotatablyand slidably mounted and split .forrproviding complementary 'portions movable" with re- Ifor shifting the gears.I s' rIhev combination spect to each othermeans for rotatively posi:- tioiiing the complementary portions, means for operatively connecting the portions when properly' positioned With the "gears,l and means for` sliding the portionsvvherebythe gears may be shiftedji n -QJXThe lcomb'nation "',itha transmission 'lol mechanism vincluding gears, or a gear shift-l s l s s vvitha transmission mechanism including gears, of a gear Shifting devicecomprising a vshaft rotatably faiidgslid-A ably Amounted and [split for providing com7 pleinentary portions movabl'etvith respect to' each otherlgmeans `for"preselecting the rota: tiveV position orfgfthfe complr'e'iiientary` Vportions, means for'rotating the. shaftvvvliereb the complementary portions may be disposed in their preselected positions, mean'sfforV operatively;connecting the]l complementary portions vvhenproperly positionedyvith the gears, and means `orpsliding the Awhereby the gearsmay beshifted..

s v4. Tliecoinbinaltion nwith a transmission mechanismincluding gears, of a gear shifting device comprisinga shaft rotatablyland slidably mounted and split Vfor `'providing complementary vportions movable With, respect to .each otlier,means `for preselecting therotative position of lth'eco'mplementary portions, means "for rotating the shaftwherebv the complementary portions may bei-disposed in their preselected positions, means for opery at'ively connecting the i complementary Ipor- 'tions VWhen properly positioned jvvith the gears, and means operativelyV connecting a clutch lmeans vvithzthecomplementary por-l tions vvliereby said nportions ,may be ,moved 'for shifting the gears when the-clutch means is actuated. i 4 4, i Thecombination with-a transmission mechanismincluding gears, of a gearshifting device comprising ashaft rotatably and slidablyA mounted and' split ffor providing a pair of complementary portions, saidfcomplementary portions' being movable in opposite directions simultaneously, means; forUrota-fl vtively positioningthe complementar-yp@- tions, meansv forfoperatively connectingthe portions when properly positioned vvithfthe' gears, and means lfor slidingfthefportions whereby the gears maybe shifted. f f; The combination with a transmission nis iis

mechanism including gears, of a'gear shifting devicecomprising a shaft rotatably and slidably mount-ed and split for providing a pair of complementary portions, said complementary portions being movable in opposite directions simultaneously, `means for rotatively .positioningthe complementary portions, movable means connected with the gears, .means carried by the portions and adapted for operative engagement with `the movable means when Vthe portions are rotatablyipositioned, and means for sliding the portions whereby the movable means may be actuated for shifting thegears.

7. The combination with a transmission mechanismincluding gears, of a gear shifting devicecomprising a shaft rotatably and slidably mounted and split for providing a pair of complementary portions, said complementary portions beingmovable ,in opposite directions simultaneously, means for preselecting the rotative position vof the complementary portions, means for rotating the shaft whereby-the complementary portions may be disposed iii-'their ,preselected positions, means foroperatively connecting the complementary portions when properly positioned with the gears, and means for sliding the p0rtions whereby the gears may be shifted.

8. 'The combination with a transmission mechanism including gears, of a gear shifting devicecomprising a shaft rotatably and slidably mounted and split for providing a pair of complementary portions, said coinpleinentary portions 'being movableY in opposite directions simultaneously, means for `preselecting'the rotative position of the complementary portions, means for rotating the shaft whereby the complementary portions may be disposed in their preselected positions, Ymeans for operatively connecting the complementary portions when properly positioned with the gears, and means operatively connecting aclutch `means with the complementary portions wliereby said portions may be moved forshifting the ,gears when the clutch means is actuated.

9. "The combi-nation with a transmission mechanism including gears, of a'gear shifting -device comprising a shaft rotatably and slidably mounted and split for providing complementary portions movable with respect to each other, means for supporting said split shaft, means mounted on said supporting inea-ns and voperatively associated with said split shaft whereby the compleinentary portions may be rotatably positioned, means for operatively connecting the complementary portions when properly positioned with the gears, .and means for sliding the 4portions whereby the gears may be shifted.

l0. `Tlieco1nb`ination with a ,transmission mechanism includinggears, of a gear shifting device comprising a shaft rotatably and slidably mounted and split 'for 'providing a pair of complementary portions, said complementary portions being Vmovable in opposite-directions simultaneously, means for supporting said split shaft, means mounted on said supporting means and operatively associated f device comprising a shaft rotatably and slidf ably `mounted and split .for providing coniplementary portions movable withrespect .to each other, means for supporting said split shaft, means vmounted onV said supporting I means and operatively associated with said splitV shaft whereby the complementary portions may be rotatably positioned, movable means connected with the gears, `means cai'- ried by the .portions andadapted for operative engagement `with .the :movable means when the portions are rotatably positioned, and means .for sliding the portions whereby the movable means maybeactuated rforshifting thegears.y

l2. The combination with a transmission mechanism including gears, of a gear shifting device comprising a shaft rotatably and slidably mounted vand `split for providing complementary .port-ions .movable with respect to each other, means for supporting said split shaft, means mounted on said supporting means and operatively associated with said split shaft whereby the complementary portions maybe rotatably positioned, means for preselecting -the .rotative position of the complementary portions, .means .for rotating the shaft whereby the complementary portions may be disposed in their .preselected positions,.means for-operatively connecting the complementary portions when properly positioned with the gears, and means for sliding the portions .whereby the gears may be shifted.

The combination with .a transmission mechanism including gears, of a gearshi-ftnig device comprising a shaft rotatably .and slidably mounted and split, for .providing complementary portions movable -with respect to each other, means for supporting saidsplit shaft, means .mounted on said sup'- porting means and operatively associated with said split `shaft Awhereby the complementary portions ymay be .rotatably positioned, means for preselecting the rotative position of theA complementary portions, means for rotating the Ashaft whereby .the complementary .portions maybe disposed in their preselected positions, means for operatively connecting the :complementary vfporlil() 4 on said supporting means and operativelyV supporting said split shaft, means mounted on said supporting means and operatively associated with said split shaft whereby the complementary portions may be rotatably positioned, movable means connected with the gears, means carried by the portions and adapted foroperative engagement with the movable means when the portions' are rotatably positioned, and means for sliding the portions whereby the movable means may be actuated for shifting the gears. 'A

. 15` The combination with a transmission mechanism including gears, of a gear shifting vdevice comprising a shaft rotatably and slidably mounted and split for providing a pair of complementary portions, said complementary portions being movable lin opposite directions simultaneously, means for supporting said split shaft, means mounted associated ,with said split shaft whereby the complementary portions may be rotatably y positioned, means for preselecting the rota# tive position of the complementary portions, means for rotating the shaft whereby the for shifting the gears when the clutch means is actuated.

17. A device of the type described com V prising a transmission mechanism including` gears, a clutch disposed between the trans-- mission mechanism and a driving shaft, an auxiliary clutch disposed between the transmission and a driven shaft, means for actuating lsaid clutches, a transmission braking mechanism, means associated with the clutch actuating mechanism for operating the braking mechanism, a gear shifting mechanism,

associated with the transmission mechanism, said gear shifting mechanism comprising complementary movable members, movable arms associated withr the transmission movable gears, said complementary movable members being provided withmeans Vfor operatively engaging and disengaging' said Amovable arms, supporting members disposed at each end' of the movable membersand vadapted to rotatably receive the ends of the movable members, one of the supporting members being provided with meansfor rotatably positioning said movable members when said movable members are: actuated,

means associated with the positioning means for predetermining the rotative position ofV the movable members, a gear-shifting actuating meansV associated with the clutch actuatmovable membersV for vrotating them when ingmeans, and means associated with the'y the clutch actuating mechanism is operated.4v I

Signedatl Chicago, inthecounty of Cook, and State of Illinois, this 28th day of `January', A. D. l930.

JOHN H. MoCARTI-IY.

con'ipleinentary portions may be disposed in their preselected positions, means for opera-` tively connecting the complementary por? tions when properly 'positioned with the gears, and means for sliding the portions whereby the gears may be shifted.

16. The combinatioiiwith a transmission 4mechanism including gears, of a gear shifting device comprising a shaft` rotatably and slidably mounted and split for providing a pair of complementary portions, said complementary portions being movable in `oppositev directions simultaneously, means for supporting said split shaft, means mounted on said supporting means and operatively associated with said split shaftv whereby the complementary portions may be rotatably positioned, means for preselectingthe rotative position of the complementary portions, means for rotating the shaft whereby the complementary portions may be disposed in their preselected positions, means for opera tively connecting theV complementary por-v tions when properly positioned with the gears,'and means operatively connecting a clutch means with the complementary portions whereby said portions may be moved 

